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• DNS records on website.. What are they for?

  - by Blake Nic

  Recently we had to get some ddos protection for our website because of the large attacks we were seeing after getting a bit of popularity. We handed over our domain and hosting information to our ddos protection provider. It worked perfectly but I have a question. On our DNS records we have the Host and Answer and Type. The Host has our domain name there. The answer is this: SOMETEXTXXXX.dv.googlehosted.com. And when i copy and paste it into my browser it gives me a 404 error. But our website still loads and functions as it should. I don't understand why it would need this? I asked them about this and they said it is a method for ddos protection and the other IPs are the reverse proxy (the other ips give a 404 error too). Can anyone expand on this more please. How does all this tie in together and make the internet browser know where to point the person with all these reverse proxies and stuff I don't understand. Thank you. Here is an image for reference: http://i.stack.imgur.com/qo5QO.png

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• The one feature that would make me invest in SSIS 2012

  - by Peter Larsson

  This week I was invited my Microsoft to give two presentations in Slovenia. My presentations went well and I had good energy and the audience was interacting with me. When I had some time over from networking and partying, I attended a few other presentations. At least the ones who where held in English. One of these was "SQL Server Integration Services 2012 - All the News, and More", given by Davide Mauri, a fellow co-worker from SolidQ. We started to talk and soon came into the details of the new things in SSIS 2012. All of the official things Davide talked about are good stuff, but for me, the best thing is one he didn't cover in his presentation. In earlier versions of SSIS than 2012, it is possible to have a stored procedure to act as a data source, as long as it doesn't have a temp table in it. In that case, you will get an error message from SSIS that "Metadata could not be found". This is still true with SSIS 2012, so the thing I am talking about is not really a SSIS feature, it's a SQL Server 2012 feature. And this is the EXECUTE WITH RESULTSETS feature! With this, you can have a stored procedure with a temp table to deliver the resultset to SSIS, if you execute the stored procedure from SSIS and add the "WITH RESULTSETS" option. If you do this, SSIS is able to take the metadata from the code you write in SSIS and not from the stored procedure! And it's very fast too. Let's say you have a stored procedure in earlier versions and when referencing that stored procedure in SSIS forced SSIS to call the stored procedure (which can take hours), to retrieve the metadata. Now, with RESULTSETS, SSIS 2012 can continue in milliseconds! This is because you provide the metadata in the RESULTSETS clause, and if the data from the stored procedure doesn't match this RESULTSETS, you will get an error anyway, so it makes sense Microsoft has provided this optimization for us.

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• Recurring lsb-release and Software Center glitch after installing MATE

  - by infomorph

  I just recently upgraded to Ubuntu 11.10. Not a fan of Unity, so I decided to try out the MATE desktop from Linux Mint. I added the Mint repository, grabbed and installed the MATE packages, and got rid of the repo so I wouldn't be downloading any other Mint packages. I did have some glitches with the packages (missing dependency stuff), but I fixed it. As other users have reported, installing MATE temporarily breaks the Ubuntu Software Center because lsb_release shows the machine as Linux Mint rather than Ubuntu. I can fix it as noted in this answer by editing /etc/*release and /etc/*issue. Problem is, this only works until I reboot the machine. Every time I reboot, /etc/lsb-release and /etc/issue revert to Linux Mint, breaking Software Center again until I edit them, again. Can anyone help me pin down what keeps changing these files? Much appreciated, thanks. Rephrasing the crux of the problem: where do /etc/lsb-release and /etc/issue get their info from? What would cause them to be revised on reboot?

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• How do create an encrypted system with multiple Linux distributions?

  - by niels

  A few weeks ago I created a completely encrypted system on a notebook and must say I like the idea. It's a little bit annoying to enter the password on every boot, but it's nice to know even if I loose the computer I don't give my data to other people. With the alternate-cd it's easy to do. Now I have to setup a new system where I want to combine the new idea with my usual usage strategy. There I have more partitions: 3 system, Home, Different Data-Partitions for vm-data, photo-data and mp3-data. The background is that I prefer not to update a system. I prefer to install the new version parallel to the old system. So I can easily test it. Obviously the Data-Partitions are used for both systems. My questions is, how can I easily combine both my strategy and the crypto-approach? Or is it impossible. The way to do the crypted stuff by hand is in my eyes to complicated.

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• How can I re-enable the typing break in 11.10?

  - by Hamish Downer

  I've just upgraded to beta 2 of Oneiric/11.10 and the typing break has gone. I've gone into the system settings and looked in "Keyboard Layout" and "Keyboard" and can't find anything. Has it just been dropped? Is there some hidden way to re-enable it? Update: Thought I'd write an update based on some stuff that has happened since this question (and the two answers) were written. Workrave has now been re-instated in oneiric-backports and for 12.04 (how to enable backports). It works fine, though if you want to put it in your systray then you need to allow it in there. The easy/lazy command line way to allow workrave into the notification area is to do something like: gsettings set com.canonical.Unity.Panel systray-whitelist "['all']" But read this question if you want a more detailed explanation about what you're doing here. Meanwhile the Gnome typing break has been split out into an app called DrWright, however it has not (at time of writing) been packaged for 11.10 (or later). And as mentioned in the other answer, another option is RSIBreak. It is a KDE app but works fine in Unity.

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• ecryptfs - decrypt and mount at boot with USB key

  - by Josh McGee

  I have a system running Ubuntu Server as a testbed for some services that I want to get familiar with. I decided to let the installation procedure set up encryption. I knew all along that I would have to decrypt it with the passphrase in order to get the system booted, but I assumed it wouldn't matter since it will only boot once or twice a month. However, my brother has informed me that he is a victim of power outages at the residence where this server is located. This means we have to explain to his girlfriend how to turn on the computer, attach a keyboard, connect a monitor (she just can't understand that she can type to the computer without a display, so whatever) and input the passphrase for us, while we are at work. I have arrived at the conclusion that I should just put together a USB key that can be plugged in before powering on the computer, to avoid all the trouble. Is this possible with ecryptfs? Is there a tutorial or simple list of instructions available so that I can knock this out and focus back on the stuff I care about? EDIT: I am aware that this is possible with LUKS and dm-crypt, but unfortunately the magical encryption that Ubuntu hands you during the installation is only ecryptfs so my question is specific to that.

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• Code maintenance: keeping a bad pattern when extending new code for being consistent or not ?

  - by Guillaume

  I have to extend an existing module of a project. I don't like the way it has been done (lots of anti-pattern involved, like copy/pasted code). I don't want to perform a complete refactor. Should I: create new methods using existing convention, even if I feel it wrong, to avoid confusion for the next maintainer and being consistent with the code base? or try to use what I feel better even if it is introducing another pattern in the code ? Precison edited after first answers: The existing code is not a mess. It is easy to follow and understand. BUT it is introducing lots of boilerplate code that can be avoided with good design (resulting code might become harder to follow then). In my current case it's a good old JDBC (spring template inboard) DAO module, but I have already encounter this dilemma and I'm seeking for other dev feedback. I don't want to refactor because I don't have time. And even with time it will be hard to justify that a whole perfectly working module needs refactoring. Refactoring cost will be heavier than its benefits. Remember: code is not messy or over-complex. I can not extract few methods there and introduce an abstract class here. It is more a flaw in the design (result of extreme 'Keep It Stupid Simple' I think) So the question can also be asked like that: You, as developer, do you prefer to maintain easy stupid boring code OR to have some helpers that will do the stupid boring code at your place ? Downside of the last possibility being that you'll have to learn some stuff and maybe you will have to maintain the easy stupid boring code too until a full refactoring is done)

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• WP E Commerce Safe Mode restriction error [on hold]

  - by Mustafa Kamal

  I have my online shop, created with WP Ecommerce getting broken after I moved it to another server. I could be sure that the problem comes from WP Ecommerce because when I disable that plugin. Everything run as expected. This is the exact error message Warning: session_start() [function.session-start]: SAFE MODE Restriction in effect. The script whose uid is 515 is not allowed to access /tmp owned by uid 0 in /home/mikalu/public_html/wp-content/plugins/wp-e-commerce/wpsc-core/wpsc-constants.php on line 17 Fatal error: session_start() [<a href='function.session-start'>function.session-start</a>]: Failed to initialize storage module: files (path: ) in /home/mikalu/public_html/wp-content/plugins/wp-e-commerce/wpsc-core/wpsc-constants.php on line 17 I've tried to turn off safe mode on my php configuration. nothing happens. the error's still there. I thought it was some kind of permission issue, so I tried to change /tmp permission to 777. Nothing happens. I googled it some more and suspect it might have something to do with fastCGI configuration and stuff. Which I totally don't understand. My googling result mostly suggest me to consult the web hosting provider or even to move to another host. But in this case, I am the owner of the server (VPS with cPanel/WHM). And I don't have any idea how to solve this kind of problem.

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• how do I write a functional spec quickly and efficiently

  - by giddy

  So I just read some fabulous articles by Joel on specs here. (Was written in 2000!!) I read all 4 parts, but Im looking for some methodical approaches to writing my specs. Im the only lonely dev, working on this fairly complicated app (or family of apps) for a very well known finance company. I've never made something this serious, I started out writing something like a bad spec, an overview of some sorts, and it has wasted a LOT of my time. Ive also made 3 mockup-kinda-thingies for my client so I have a good understanding of what they want. Also released a preview (a throw away working app with the most basic workflow), and Ive only written and tested some of the very core/base systems. I think the mistake Ive been making so far is not writing a detailed spec, so Im getting to it now. So the whole thing comprises of An MVC website (for admins & data viewing) 2 Silverlight modules (For 2 specific tasks) 1 Desktop Application Im totally short on time, resources and need to get this done quick, also, need to make sure these guys read it up equally quick and painlessly. So how do I go about it, Im looking for any tips, any real world stuff, how do you guys usually do it? Do you make a mock screenie of every dialog/form/page? Im thinking of making a dummy asp.net web forms project, then filling in html files in folders and making it look like my mvc url structure. Then having a section in the spec for the website and write up a page for every URL Ive got with a screenie. For my win forms app, Ive made somewhat of a demo Win Form project, would I then put in a dialog or stucture everything as I would in the real app and then screen shot it?

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• help installing some java and flash

  - by william

  ok so i have git now and some other stuff but ive looked around and all and i dont get very help full info Instructions 1 Download the latest version of Flash Player from the Adobe Website. Click on "Download the Latest Player," and choose ".deb for Ubuntu" from the drop down list. 2 Choose "Save File" from the pop up window. Sponsored Links Google Cloud Hosting Build And Run Your App Using Google App Engine cloud.google.com/appengine 3 Open a terminal window. The terminal window will be found under Applications - Utilities. 4 Change to the directory where your downloaded file was saved. cd Download 5 Install the libcurl3 library. sudo apt-get install libcurl3 6 Install the Flash Player. sudo dpkg --install install_flash_player__linux.deb Replace with the latest version number. 7 Restart Firefox. 8 Check that Flash Player was installed. Type about:plugins in a browser window, and look for the flash player MIME type. Read more: http://www.ehow.com/how_5068467_install-flash-player-ubuntu.html#ixzz2ixPj47qS what i dont is how the heck i change the directory and all that crap witch they say every one know

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• Is paper indispensable in a programmer's everyday work?

  - by rwong

  As a programmer who work in a company whose vision is to make paperless office possible, is there any way I can work effectively while using less paper? I can list at least several kinds of papers I use quite often: Paper notebook, on which I do most of the pre-coding design work and ideas Books Temporary printouts of source code, though not so often (in color, with a 6 point font at 600 DPI) Sticky note, to remind myself of things that should be taken care of within a few days On the other hand, I also use a wiki and an office text editor. Once a while I would use a diagramming software to make a few flowcharts. Deeper questions: Is there a relationship between paper use and productivity? How can programmers help save the trees? Is paperless software development fundamentally different from paperless office? Related questions: Do you ever write code with pen and paper, and should we do it more often? What physical tools do you find useful to work as a programmer? What things are essential on a programmer's desk? Stuff every programmer needs while working Additional info, if it helps: Everyone has dual monitors. We have decent project management and issue tracking software (both web-based). Please be constructive. In particular, please give your answer to your peer programmers who wish to be flexible and are willing to change working style in order to become more productive as well as meeting certain their own personal values. Edited: I removed the company's view because it appears to be too flamebait. If you need to see my original words, go to the edit history. Deleted: Doxygen and whiteboard. Reason: disregarding my personal experience with these great tools, we never had to print out anything as a consequence of using/not using them. To see my original words, go to the edit history.

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• Is defining every method/state per object in a series of UML diagrams representative of MDA in general?

  - by Max

  I am currently working on a project where we use a framework that combines code generation and ORM together with UML to develop software. Methods are added to UML classes and are generated into partial classes where "stuff happens". For example, an UML class "Content" could have the method DeleteFromFileSystem(void). Which could be implemented like this: public partial class Content { public void DeleteFromFileSystem() { File.Delete(...); } } All methods are designed like this. Everything happens in these gargantuan logic-bomb domain classes. Is this how MDA or DDD or similar usually is done? For now my impression of MDA/DDD (which this has been called by higherups) is that it severely stunts my productivity (everything must be done The Way) and that it hinders maintenance work since all logic are roped, entrenched, interspersed into the mentioned gargantuan bombs. Please refrain from interpreting this as a rant - I am merely curious if this is typical MDA or some sort of extreme MDA UPDATE Concerning the example above, in my opinion Content shouldn't handle deleting itself as such. What if we change from local storage to Amazon S3, in that case we would have to reimplement this functionality scattered over multiple places instead of one single interface which we can provide a second implementation for.

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• How-To Geek Gets the Microsoft MVP Award, Thanks to You

  - by The Geek

  The How-To Geek has won a Microsoft MVP award for the second year in a row, and it’s all thanks to you, our great readers that keep the site going. Join us for some mutual back-patting and some terrible photography of all the award stuff. Of course, if you’re familiar with the MVP award you’ll probably know that it’s actually for a single person, but in my opinion the award belongs to the entire How-To Geek community, without which this site would be nothing. Latest Features How-To Geek ETC HTG Projects: How to Create Your Own Custom Papercraft Toy How to Combine Rescue Disks to Create the Ultimate Windows Repair Disk What is Camera Raw, and Why Would a Professional Prefer it to JPG? The How-To Geek Guide to Audio Editing: The Basics How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 Five Sleek Audi R8 Car Themes for Chrome and Iron MS Notepad Replacement Metapad Returns with a New Beta Version Spybot Search and Destroy Now Available as a Portable App (PortableApps.com) ShapeShifter: What Are Dreams? [Video] This Computer Runs on Geek Power Wallpaper Bones, Clocks, and Counters; A Look at the First 35,000 Years of Computing

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• Data binding in web UI frameworks, what's the deal?

  - by c-smile

  I believe that most of modern Web frameworks that pretend to be MVC ones also has a notion of data binding in one form or another. Examples: AngularJS, EmberJS, KnockoutJS, etc. I am assuming that "data binding" is a declarative definition (oxymoron, no?) of live link between data (a.k.a. model) and its representation (a.k.a. view). With some transformers in between (a.k.a. controllers). I understand why declarativeness is kind of appealing but also understand that as usual it comes with the price. In particular: 1. Live binding is quite heavy, either with dirty watch (high CPU consumption) or with Object.observe() (high memory consumption with high CPU load in some scenarios). 2. There is a "frame" part in the framework word, means there are some boundaries/limits that can be hard to overcome if you need slightly more than it was designed for. Quite usual time split: 90% of features are made in 10% of project time. But 10% rest take 90% of project time. I suspect (a.k.a. educated guess) that those MVC things are not helping to implement more functionality in less time... If so their usage motivation is not quite clear. As an example: last week wanted to find virtual list idea/solution. Found one in vanilla JavaScript that is 120 LOC. Implementation of the same but in AngualrJS is about 420 LOC. Most of the code there seems like a fight with the framework itself... So is my question: what benefits that MVC stuff or data binding give us? Is it just a buzzword popular among project managers or they give us something useful. If later one then what exactly?

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• Unavailable packages repository

  - by bitmask

  I'm running ubuntu 11.10 (oneiric) on this machine, and suddenly, apt is unable to update properly. If I ask it to update its package information, by running apt-get update (or alternatively telling the update manager to "check"), it succeeds for about 120 packages (more precisely, I get about 120 Ign/Hit notes) and then says it cannot find universe Sources and restricted amd64: Hit http://de.archive.ubuntu.com oneiric-backports/multiverse Translation-en Hit http://de.archive.ubuntu.com oneiric-backports/restricted Translation-en Hit http://de.archive.ubuntu.com oneiric-backports/universe Translation-en Err http://de.archive.ubuntu.com oneiric/universe Sources 404 Not Found [IP: 141.30.13.20 80] Err http://de.archive.ubuntu.com oneiric/restricted amd64 Packages 404 Not Found [IP: 141.30.13.20 80] W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/oneiric/universe/source/Sources 404 Not Found [IP: 141.30.13.20 80] W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/oneiric/restricted/binary-amd64/Packages 404 Not Found [IP: 141.30.13.20 80] E: Some index files failed to download. They have been ignored, or old ones used instead. I manually checked the de server and cannot find anything wrong with the stuff it's complaining about. Also it looks pretty much like, say, the us mirror. But oddly enough, the IP it lists, seems to point to a debian package server, which obviously does not contain ubuntu packages. So, is this a local problem that I can fix somehow (and if so, how?) or is there actually some server down right now?

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• Is DQS-in-the-cloud on its way?

  - by jamiet

  LinkedIn profiles are always a useful place to find out what's really going on in Microsoft. Today I stumbled upon this little nugget from former SSIS product team member Matt Carroll: March 2012 – December 2012 (10 months)Redmond, WA Took ownership of the SQL 2012 Data Quality Services box product and re-architected and extended it to become a cloud service. Led team and managed product to add dynamic scale, security, multi-tenancy, deployment, logging, monitoring, and telemetry as well as creating new Excel add-in and new ecosystem experience around easily sharing and finding cleansing agents. Personally designed, coded, and unit tested in-memory trigram matching algorithm core to better performance, scale and maintainability. Delivered and supported successful private preview of the new service prior to SQL wide reorganization.  http://www.linkedin.com/profile/view?id=9657184  Sounds as though a Data-Quality-Services-in-the-cloud (which I spoke of as being a useful addition to Microsoft's BI portfolio in my previous blog post Thoughts on Power BI for Office 365 ) might be on its way some time in the future. And what's this SQL wide reorganization? Interesting stuff. @Jamiet  

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• Steam on 64-bit 14.04: need some help, missing a few 32-bit libs

  - by YellowShark

  Steam says I'm missing the following libs, I'm hoping someone can help me get things in better shape: xyz@abc:~$ STEAM_RUNTIME=0 steam Running Steam on ubuntu 14.04 64-bit STEAM_RUNTIME is disabled by the user Error: You are missing the following 32-bit libraries, and Steam may not run: libpangoft2-1.0.so.0 libpango-1.0.so.0 libgtk-x11-2.0.so.0 libgdk_pixbuf-2.0.so.0 Installing breakpad exception handler for appid(steam)/version(1401381906_client) Installing breakpad exception handler for appid(steam)/version(1401381906_client) [2014-06-11 20:45:39] Startup - updater built May 29 2014 09:19:23 [2014-06-11 20:45:39] Verifying installation... [2014-06-11 20:45:39] Verification complete [2014-06-11 20:45:42] Shutdown I tried installing the following i386 packages: libpango-1.0-0:i386, libpangoft2-1.0-0:i386, and libgdk-pixbuf2.0-0:i386, and symlinking the .so files (from usr/lib/i386whatever../) into the ~/.local/share/Steam/ubuntu12_32/ folder, but wasn't able to find the right match for the gtk-x11 lib, and ultimately would up with a different, but still non-working situation. So I've back-tracked to this point, and have removed those i386 packages for now. It's worth noting thatSteam runs if I don't use STEAM_RUNTIME=0. Also, Steam seemed to "recognize" the i386 version of the libpango & libpangoft2 libs after I symlinked them into place, during the course of my troubleshooting; when I would rerun STEAM_RUNTIME=0 steam, it wouldn't list those two items as missing anymore. Instead though, I had a bunch of gtk-related issues, something about overlay-scrollbar not available, as well as warnings that it can't find the murrine engine... a whole bunch of stuff that sounded like I'd gone too far down the wrong path. Anyhow, any help sorting this out would be appreciated, and thanks!

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• How To Use AutoFill on a Google Docs Spreadsheet [Quick Tips]

  - by The Geek

  Have you ever wanted to fill an entire row or column with a series of values? If you’re an Excel user, you can do the same thing in Google Docs. If you haven’t used either, here’s the quick way to do it. Just type in a couple of numbers in sequence… 1 2 3 works pretty well. You could also put them across a row instead of down a column. Then move your mouse over the dot in the corner until the pointer changes, then just drag it downward (or if you are filling a row instead, you can drag it to the right). Let go of the mouse, and your data will be automatically filled in. You could also make it skip by 1 instead, like 2 4 6 8, etc… It all works the same way. Sadly there’s no really advanced options like Excel has, but for most uses, this is good enough. Also, we’re aware this is a very simple tip for most of you, but we’re trying to help the beginners out as well! Similar Articles Productive Geek Tips Integrate Google Docs with Outlook the Easy WayHow To Export Documents from Google Docs to Your ComputerHow To Monitor Sites Without an RSS Feed Using FirefoxGeek Software: Use DeliCount to Get Site-wide del.icio.us Bookmark CountsMake Excel 2007 Read Spreadsheets To You TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 Combine MP3 Files Easily QuicklyCode Provides Cheatsheets & Other Programming Stuff Download Free MP3s from Amazon Awe inspiring, inter-galactic theme (Win 7) Case Study – How to Optimize Popular Wordpress Sites Restore Hidden Updates in Windows 7 & Vista

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• Too sell or give for free

  - by QAH

  Hello everyone! I am currently making a game that I was originally planning to sell. It is a simple 2D arcade style game for the PC. I've seen many indie games become popular and generate revenue from advertisements, but the game itself remains free. I need some advice on whether or not I should sell my game, release it for free with advertisements, or ask for donations and keep the game free. I feel that my game is fun, but of course the graphics aren't tip top because I am a programmer, not an artist. I just take screenshots of 3D models I get from Turbosquid and crop around it to make a sprite. Also, and I could be very wrong about this, it seems that there are more legal issues surrounding selling a game than making it free and generating revenue from advertisement, or asking for donations. If I am wrong, someone please correct me. Also, I am very interested in generating some revenue for my work, but that isn't at the very top of my list. I am in my last year of high school, soon to be going to college, and I am going to major in computer science/software engineering. So I am trying to gain some preliminary experience at home by coding stuff every day. One way of getting this experience is by making this game. So what do you think? What route should I take? What has worked well with other indie games? Thanks in advance.

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• Oracle OpenWorld and JavaOne are right around the corner!

  - by Eric Jensen

  It's that time of year again! Oracle OpenWorld and JavaOne are now upon us. Below is a list of events and demos at OpenWorld and JavaOne where you can check out the cool stuff people are doing with our products, Berkeley DB and Database Mobile Server. We've got some exciting things lined up, hope to see you there! Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Keynote Wed 3 Oct, 2012 8:00 AM - 9:30 AM Java Embedded: Market Strategy Hotel Nikko - Nikko Ballrooms II & III Conference Session Mon 1 Oct, 2012 8:30 AM - 9:30 AM CON7100 - Developing with Berkeley DB and Oracle Database Mobile Server for Java Embedded Hotel Nikko - Nikko Ballroom II & III HOL (Hands-on Lab) Mon 1 Oct, 2012 7:30 PM – 9:30 PM HOL7889 - Java SE Embedded Development Made Easy Hilton San Francisco - Franciscan A/B/C/D Demos JavaOne Exhibition: Unifying M2M and Mobile in Healthcare Hilton Hotel Grand Ballroom Exhibition Hall Booth 5605 mFrontiers mFinity demo Moscone South Left - 136

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• Session management error: None of the authentication protocols specified are supported

  - by JBWhitmore

  The title is the first error that has sent me on a mission to fix things. Motivation: I was trying to install the new Enthought Python Distribution -- when the error above first showed up. The install finished -- and looked like there were a few more times it flagged dcopserver problems: Please check that "dcopserver" program is running! Could not read network connection list: ~/home/user/.DCOPserver_host__0 When running ipython from the distribution, it claims that readline (the ability to up arrow in history or tab-complete) is not available for my system. It is though -- if I run the ipython that's sitting in /usr/bin/ipython all readline features work perfectly. So, I tried to fix the install by trying to fix what I thought could be causing the problems. Bad things that are happening that I want to be fixed: When restarting I get the error: Could not update ICEauthority file /home/username/.ICEauthority. ipython readline doesn't work with Enthought's ipython Things I have tried: changed the owner of my ~/.ICEauthority to be me. changed the owner of home directory (and all nested files and folders) to be me double checked that /var/lib/gdm was owned by Gnome (yep) attempted to reinstall DCOP, kbuildsycoca stuff (fail) I've removed nautilus; rebooted; reinstalled; rebooted; removed ubuntu-desktop; rebooted; reinstalled; rebooted. Any suggestions on how to fix the Bad Things that are happening would be greatly appreciated! Computer: Ubuntu 10.04 x86

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• Understanding Visitor Pattern

  - by Nezreli

  I have a hierarchy of classes that represents GUI controls. Something like this: Control-ContainerControl-Form I have to implement a series of algoritms that work with objects doing various stuff and I'm thinking that Visitor pattern would be the cleanest solution. Let take for example an algorithm which creates a Xml representaion of a hierarchy of objects. Using 'classic' approach I would do this: public abstract class Control { public virtual XmlElement ToXML(XmlDocument document) { XmlElement xml = document.CreateElement(this.GetType().Name); // Create element, fill it with attributes declared with control return xml; } } public abstract class ContainerControl : Control { public override XmlElement ToXML(XmlDocument document) { XmlElement xml = base.ToXML(document); // Use forech to fill XmlElement with child XmlElements return xml; } } public class Form : ContainerControl { public override XmlElement ToXML(XmlDocument document) { XmlElement xml = base.ToXML(document); // Fill remaining elements declared in Form class return xml; } } But I'm not sure how to do this with visitor pattern. This is the basic implementation: public class ToXmlVisitor : IVisitor { public void Visit(Form form) { } } Since even the abstract classes help with implementation I'm not sure how to do that properly in ToXmlVisitor. Perhaps there is a better solution to this problem. The reason that I'm considering Visitor pattern is that some algorithms will need references not available in project where the classes are implemented and there is a number of different algorithms so I'm avoiding large classes. Any thoughts are welcome.

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• xubuntu install on p4

  - by adi

  Hello i am thinking of installing xubuntu on a dell gx260 pentium 4 pc with: 1.8GHz processor 64mb integrated video card(had other but it died on me) 1GB of RAM Ive installed lubuntu but im not enjoying it since i can not make shortcuts of partitions or folders on desktop for faster usability(i dont want them on my bar, want them on desktop) also the buggs i seen on it made me reconsider of using lubuntu:mplayer not working, no video was working,chromium outdated etc and i dont want to stay all day to find solutions over the internet. And seen on internet from xubuntu that theyve had shortcuts for theyre partitions on desktop, and is more attractive.(can some1 tell me if with xubuntu u can make shortcuts on desktop, i mean the shortcuts remain after reboot) 1 more thing to add:at installing lubuntu when it asked me where to install it only showed me the entire hard drive(i have 3 partitions on it) and made me select the size of the lubuntu partition from 1 that the installer wanted.(from local disk D: from windows xp view),need to mention that i have windows xp on the machine which is on local C:, kept my downloads on local D:, and other stuff on E:. I want an ubuntu distro which would work fine especially for internet purpose. Can someone lend me a hand on this?

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• What benefits can I get upgrading my ASP.NET (Webform) + DAL(EF) + Repository + BLL structure to MVC?

  - by Etienne

  I'm in the process of defining an approach that may best fit our needs for a big web application development. For now, I'm thinking going with an ASP.NET Architecture with a DAL using Entity Framework, a Repository concept to not access DAL directly from BLL and a BLL that call the repository and make every manipulations necessary to prepare data to push in a presentation layer (.aspx files). I don't plan to use ASP.Net controls and prefer to keep things simple and lightweight using plain html, jQuery UI controls and do most of the server calls with jQuery Ajax. Sometimes, when needed, I plan to use handlers (.ashx) to call BLL methods that will return JSON or HTML to client for dynamic stuff. My solution also has a test project that Mock the Repository with in-memory data to not repose on database for testing BLL methods... It may be usefull to add that we will build a big application over this architecture with hundreds of tables and store procedures with a lot of reading and writing to database. My question is, having this architecture in mind, Is there any evident advantages that I can obtain by using an MVC3 project instead of the described architecture base on Webform? Do you see any problem in this architecture that may cause us problem during the next steps of development? I know the MVC pattern for using it in others projects with Django... but the Microsoft MVC implementation look so much more complex and verbose than Django MVC and it's why I'm hesitating (or waiting for a little push?) right now before jumping into it... We are in a real project with deadlines and don't want to slow the development process without any real benefits.

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• MightyMintyBoost Is a 3-in-1 Gadget Charger

  - by ETC

  If you’re looking for a versatile battery booster, this DIY 3-in-1 solar/usb/wall current charger known as the MightyMintyBoost will top of your phone, mp3 player, and other gadgets with ease. Instructables user Honus didn’t just build the MightMintyBoost to geek out and show off his electronics project skills (although it’s certainly a nifty little project to do so), he’s serious about solar power and the impact clean energy has: Apple has sold over 30 million iPodTouch/iPhone units- imagine charging all of them via solar power…. If every iPhone/iPodTouch sold was fully charged every day (averaging the battery capacity) via solar power instead of fossil fuel power we would save approximately 50.644gWh of energy, roughly equivalent to 75,965,625 lbs. of CO2 in the atmosphere per year. Granted that’s a best case scenario (assuming you can get enough sunlight per day and approximately 1.5 lbs. CO2 produced per kWh used.) Of course, that doesn’t even figure in all the other iPods, cell phones, PDAs, microcontrollers (I use it to power my Arduino projects) and other USB devices that can be powered by this charger- one little solar cell charger may not seem like it can make a difference but add all those millions of devices together and that’s a lot of energy! His MightyMintyBoost is a battery booster for devices that can charge via USB and it accepts incoming current from the solar panel on top (or, on cloudy days can be charged via a wall charger or the USB port on your computer). Hit up the link below to see his full build guide and create your own MightyMintyBoost. MightyMintyBoost [Instructables] Latest Features How-To Geek ETC Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware How to Change the Default Application for Android Tasks Stop Believing TV’s Lies: The Real Truth About "Enhancing" Images The How-To Geek Valentine’s Day Gift Guide Inspire Geek Love with These Hilarious Geek Valentines MyPaint is an Open-Source Graphics App for Digital Painters Can the Birds and Pigs Really Be Friends in the End? [Angry Birds Video] Add the 2D Version of the New Unity Interface to Ubuntu 10.10 and 11.04 MightyMintyBoost Is a 3-in-1 Gadget Charger Watson Ties Against Human Jeopardy Opponents Peaceful Tropical Cavern Wallpaper

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